with two or more pistons reciprocating one within another, e.g. one piston forming cylinder of the other

Full Title

Machines or engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders > with two or more pistons reciprocating one within another, e.g. one piston forming cylinder of the other

Classification Context

Section:

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

Class:

MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES

Subclass:

MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES